Electrical condenser



Aug. 9, 1932. DUIBILIER 1,870,950

ELECTRICAL CONDENSER Filed Sept. 9 1926 V/ 7 Z :4 I IIIIIIIIIIIIIlIIIIlII/IIII/I/III/[III/[E g INVENTOB Wdham Dahlia BY h W ATTORNEYPatented Aug. 9, 1932 UNITED STATES PATENT OFFICE WILLIAM DUBILIER; OFNEW ROCHELLE, NEW YORK, ASSIGNOR TO DUBILIER CON- DENSER CORPORATION, OFNEW YORK,

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n. Y., a conromrronor nnmwenn connnnsnn Application filed September 9,1926. Serial No. 184,532,

' This invention relates to electrical condensers; especially electricalcondensers of unchanging capacity. I

An object of the invention is to provide an electrical condenser havingamolded covering that completely houses and seals up the body of thecondenser, requires a comparatively small amount of insulation; andthusreduces to a minimumthe losses which the presence of such a substanceentails.

The nature of the invention is set forth the following description, andthe novel features are defined in the appended claim; but the disclosureis explanatory only, and Ireserve the right to make any changes that do"not exceed the scope and meanings of the broad terms in which the claimis expressed.

On the drawing Figure 1 is a perspective view of a condenser accordingto my invention;

Figure 2 is a longitudinal section; and Figures 3 and 4 are similarviews of modificaticns. 1 I Y The same numerals identify the same'partsthroughout.

The condenser comprises a body 1 whichv can be made up in the usualway'by interleaving sheets or plates of metal such as metal foil withintervening sheets-of insu lation, part of the sheets of metal foil ofone polarity projecting from one extremity of the body or stack, of thecondenser as indicated at 2, and the remaining sheets of metal foil ofopposite polarity project fromthe opposite end of the stack, asindicated at 3, and the projecting ends of the sheets of foil ofopposite polarity 2 and 3 can be folded down upon the top of the stackand be united to contacts 4 and 6 respectively; these contacts being inthe form of plates or strips ilar to the condenser of Patent No. 1,833,-392, issued November 24, 1931. In that patent, however, I describe thecasing as provided with a closure consisting of a sheet of bakelitewhich is received in the open topof the casing 8 and has openingsthrough which the'terminals 4 and 6 project, and the bakelite is held inplace by turning down the upper edges of the sides of the casing 8around the rim of the top thereof, so as to press down upon the top ofthe sheet'of bakelite all around the periphery thereof. v

"With such a construction, however, the

body of the condenser cannot always be enclosed by the casing in aleak-proof manner, and I find it advantageous to use in place of thebakelite plate, a closure 10 of molded insulation which can be bakelite,or any suitabl material. This closure is held in place by the inturnededges 9 of the vrim or mouth of the casing 8, projecting into the edgesof the molded closure 10, and this closure may fit snugly upon the topof the body of the condenser and engage the bases 5 and 7 of theterminals {1 and 6, and the top of the body 1. The insulation may alsofill the spaces between the body of the condenser and sides of thecasing 8. Between the body of the condenser or stack 1 and the bottom ofthe casing 8, is a sheet of insulation 11.

By this procedure I obtain a covering for the condenser which is partlyof metal and partly'of insulation, and molded together. The stack 1 issecurely sealed in the covering, and by reason of the fact that theinsulation 10 comprises only the top of the casing and constitutes aclosure therefor, the amount of insulation is relatively small and thelosses due to theinsulation in operation are reduced.

In Figure 3 I show a condenser comprising a metallic casingv 12containing a suitably clamped body or stack 13 made up of sheetsbeinglconnected to the bottom of the casing 12, andthe other beingconnected to a high.

tension stem or terminal 14. The casing 12 is closedat the sides andbottom as before,

but open at the top, which has a rim 15 surrounding a shoulder 16. Onthis shoulder 16 rests the closure 17 which, as before, consists ofsuitable insulation, molded so as to engage the top of the condenser,and having a central boss 18 through which the stem or terminal 14projects. This construction also makes a perfectly leak-proof fitting.

In Figure 4 there is having a clamped condenser 20therein, and thiscondenser has a central stem or terminal 21 which projects through thecenter of a restricted neck 22 at the top of the casing 19. The mouth ofthe neck is engaged by a closure 23, which as before, is of moldedinsulation, molded around the edge of the mouth of the neck. andefliciently engaging same- Having described my invention, what I-believe to be new and desire to secure and rotect by Letters Patent ofthe United tates is 1-7- A condenser comprising a body, a casing toreceive said body, said casing having an opening therein, and a, flangeat the rim thereof, terminals connected to said body, the body andterminals being imbedded and fixed in an insulating compound, the saidcompound overlying the rim portion of the casing and forming a covertherefor.

In testimony whereof I aflix my signature.

WILLIAM DUBILIEB.

a metallic casing 19

